Adu Construction Chashire, OR

Professional ADU construction in Eugene, Oregon for increased property value and rental income.

Local ADU Construction Expertise

In Eugene, accessory dwelling units solve the housing challenge for families needing rental income, multigenerational space, or guest quarters. ADU construction in Eugene requires permits, foundation work, and knowledge of local codes—we handle the full process from design through inspection.

How We Work

We guide you through each phase with clear timelines and no surprises. From initial assessment to final walkthrough, you'll know exactly what happens next.

Planning & Site Preparation

We start by understanding your needs and the site conditions. Eugene lots vary widely—some have slopes, utilities placement, or setback challenges that affect design.

We assess utility connections, check zoning and lane-house rules specific to your neighborhood, and prepare permit documentation. This phase ensures we avoid costly changes mid-project.

Foundation & Framing

Solid foundations are non-negotiable in Eugene's wet climate. We build to code with proper drainage and moisture protection from the start.

Framing comes next—walls, roof, and structural support. Every connection is inspected before we move forward. You'll see the structure take shape week by week.

Systems & Interior Finish

Electrical, plumbing, and HVAC are run before drywall. We coordinate rough inspections and ensure all trades sync properly.

Interior finishes follow: insulation, drywall, flooring, and cabinetry. Each step is scheduled so the project flows without bottlenecks.

Final Inspection & Handoff

The city conducts final inspections. We coordinate all appointments and fix any items the inspector flags.

Once you get your occupancy permit, we walk through the space with you, show how systems work, and hand you the keys. Your ADU is ready to use or rent.

You'll always know what's happening next—and when.

Our Services

ADU construction in Eugene covers everything from small backyard studios to full two-bedroom units. We also handle related projects that maximize your property value.

Detached ADU Construction

A detached ADU sits on your lot as its own structure—ideal for Eugene properties with room to spare. Perfect for rental income or family housing.

We handle site layout, foundation, utility extensions, and full construction. Building in neighborhoods like South Eugene or near UO requires familiarity with local setback rules and neighborhood character—we know them.

Garage Conversion & ADU Hybrid

Converting an existing garage into living space speeds up the timeline and lowers costs. Add a new garage structure alongside, and you get dual functionality.

We assess structural integrity, handle utilities relocation, and navigate permit requirements. Many Eugene properties in Willamette area have older garages perfect for this approach.

Accessory Dwelling Unit Framing & Build-Out

If you've got slab work or shell framing underway, we step in for framing, mechanical systems, and finish carpentry.

We coordinate with your existing contractor and ensure quality at every stage. Specialty work like ADU electrical (separate meters) and plumbing (code-compliant) requires expertise we've honed across dozens of Eugene projects.

Deck & Entry Solutions

An ADU needs a well-built entry and often deck or patio space. We handle decking, stairs, railings, and outdoor connections.

Eugene's rain and freeze cycles demand proper drainage and durable materials. We use pressure-treated lumber and composite decking built to code, lasting 15+ years without excessive maintenance.

Why It Matters

ADU construction is a smart investment in Eugene's competitive housing market. It adds value, creates rental income, and solves space needs for families.

Local Code Expertise Saves Time & Money

Eugene and Lane County have specific ADU rules: minimum lot size, setbacks, parking requirements, and utility capacity limits. Missing one detail can halt a project mid-build.

We know these rules by heart and build to them from day one. Permits move faster when the city sees we've done the homework. No rework. No surprises.

Eugene Weather & Durability

Rain and dampness are facts of life here. Proper grading, drainage, and moisture barriers matter more than in drier regions.

We build ADUs with sealed crawlspaces, exterior waterproofing, and ventilation that prevents mold and rot. Your ADU will last decades with minimal issues.

ADUs also boost property value—typically 15–25% depending on location, size, and rental potential in Eugene neighborhoods.

Serving Eugene and Surrounding Areas

We work across Eugene neighborhoods and unincorporated Lane County. Each area has unique lot sizes, tree cover, and permit timelines.

South Eugene & Willamette Hill Areas

These neighborhoods have tree-lined lots, mature landscaping, and strong character guidelines. ADU planning here requires sensitivity to existing yards and sight lines.

We've completed ADUs in South Eugene that blend with neighborhood character while adding value. Permits move smoothly when design respects the community context.

Near UO & University District

Close to campus, lots are typically smaller but have rental demand. Smaller ADUs (500–700 sq. ft.) work well here and lease quickly.

We build efficient units that maximize living space without eating the whole lot. Parking and entry logistics are tighter—good planning prevents neighbor friction.

West Eugene & Downtown Core

Downtown and West Eugene lots sometimes have urban infill potential. ADUs here can serve as affordable rentals or primary dwellings for young professionals.

Tighter utility connections and shared infrastructure are common. We navigate alley access, sidewalk frontage, and density rules familiar to urban Eugene lots.

What Does ADU Construction Cost & Timeline Look Like in Eugene?

ADU projects in Eugene typically take 6–10 months from permit approval to occupancy. Scope, site conditions, and permit timelines vary by neighborhood.

  • Planning & permitting: 1–3 months depending on complexity and neighborhood reviews
  • Site prep & foundation: 4–6 weeks depending on soil and drainage work
  • Framing through finish: 3–4 months for typical 800–1,200 sq. ft. unit
  • Final inspections & occupancy: 2–4 weeks after completion

Ready to discuss your project? Call us today for a free site assessment.

Frequently Asked Questions

Common questions about ADU construction in Eugene.

Do I need a separate meter for my ADU's utilities in Eugene?

Yes, if you're renting the ADU. Code requires separate electrical and water meters for rental units, letting tenants pay their own utilities and giving you cleaner accounting.

What size ADU can I build on my Eugene lot?

Maximum ADU size is typically 800–1,200 sq. ft., depending on lot size and zoning. Setbacks, height limits, and coverage ratios vary by Eugene neighborhood, so we assess your specific property first.

How long does the Eugene permit process take for an ADU?

Plan on 4–8 weeks for initial review, plus 1–2 weeks for any corrections or neighborhood feedback. We submit complete, code-compliant plans so you avoid delays.

Can I build an ADU if I have a basement or crawlspace?

Yes, but utilities and drainage must be carefully planned. We assess your site and design the ADU foundation to work with existing groundwater and utility locations.

What if my Eugene property is in a historic district or has tree preservation rules?

Historic and tree-protected properties need extra review. We coordinate with city staff early and design ADUs that honor existing character and comply with preservation requirements.

Do you handle financing or construction loans for ADU projects?

We work with homeowners and their lenders throughout construction. We provide detailed budgets, schedules, and progress documentation so your loan draws run smoothly.

DISCOVER WHAT OUR CUSTOMERS HAVE TO SAY ABOUT US

proudly serving these areas

  • Chashire, OR

  • Cottage Grove, OR

  • Dexter, OR

  • Eugene, OR

  • Junction City, OR

  • Lowell, OR

  • Noti, OR

  • Oakridge, OR

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